Large benign virilizing adrenal adenoma.

The young woman described sought evaluation for infertility and was found to have virilization due to a large left adrenal tumor. Further endocrine studies confirmed a syndrome of pure virilization with normal glucocorticoid function. Resection of this apparently benign tumor resulted in regression of virilization, as well as pregnancy. Pure virilization is an unusual manifestation of benign adrenocortical tumors, and adrenal tumors of this size are most frequently malignant.